Sorbs Spam Blacklist: What Is It and How to Delist Yourself

email deliverability checklist cover
Your open rates are low, and you're wondering why engagement is very low during your email outreach campaigns.

Possibly you could be blacklisted, and as a result, your email reputation is low.

To get out of this trap, we have created this article that will show you how to remove yourself from the Sorbs Blacklist and how to stay away from it in the future.

What Is Sorbs Spam Blacklist?

sorbs spam infographic
The SORBS (Spam and Open Relay Blocking System), run and controlled by Proofpoint, Inc., offers free access to its DNS-based Block List (DNSBL) to efficiently block email from more than 12 million host servers known to propagate spam, phishing attacks, and other types of harmful email.

This blacklist often contains email servers that are thought to be relaying or delivering spam, as well as servers that have been compromised, hijacked, or infected with Trojans. SORBS also includes a list of servers with IP addresses that are dynamically assigned.

Reasons You Might Be Blacklisted

Several factors lead to the SORBS blacklisting IP addresses, domains, or email servers.

The SORBS prevents new emails from being sent from a particular IP address or mail server when the database detects that they are attempting to spread spam.

The SORBS list has a single IP address that is suspected of sending spam or phishing emails.

By sending unsolicited bulk email messages, a sender utilizing an IP address can also have that IP address published on SORBS. If IP addresses are dynamically assigned, they may also be used to send or relay spam and end up on the SORBS spam database.

Unsecure Email Server

However, it goes without saying that you wouldn't want to spam your email subscribers, especially after they've unsubscribed from your mailing list.

Additionally, if you did this, you would be put on the blacklists for both Lashback and SORBS.

However, if your IP address or mail server has a security issue and you've been blacklisted for sending numerous spam emails to numerous addresses, this is likely the case.

Work with your network administrators to address threats so you may stop unlawful email sending from happening frequently and being blacklisted as a result.

Infections with Trojans

Trojans and other types of malware can corrupt more than just your files and emails.

They have the ability to access and infect your entire website and domain, making any interaction with these resources potentially hazardous for other email users.

Anything you send from your domain and IP addresses may also contain worms, Trojan horses, and other types of malware. Emails are a part of this.

As a result, in order to protect email users, the SORBS filters emails from IP addresses or email servers that are suspected of hosting malware or Trojans.

Frequent Spam

Even trustworthy mail servers are susceptible to being flagged.

Any IP address or email server that has been discovered to send spam emails regularly gets added to the blacklists.

Therefore, the blocklist contains domains and IP addresses that were made specifically to send spam and spread spam phishing attempts.

How to Remove Yourself From Sorbs Spam

A single IP removal policy is difficult to define due to the high number of zones that SORBS hosts. Aside from administrative error, certain lists are static and will never have the IP addresses erased. The blacklists for dynamic IP addresses are one instance of this.

Others, like the open relay blacklists, won't delete your IP until your system has been secured and your IP has passed an open relay check. Your IP address can be removed from the blacklist, but almost always, if you correct whatever it was that was causing spam.

SORBS offers comprehensive tools to assist you to figure out why you were stopped, access to mailing lists, and administrators who are eager to teach you how to make your SMTP server more secure.

You can ask to be removed from the Sorbs Spam Blacklist. The steps to do so are as follows:

1. Create a profile
2. Log in
3. Choose "Delist An IP Address" from the menu
4. You will then be asked to enter your special IP Address and click "continue"
5. There will be a list of IP addresses.
6. When you do, click "continue" next to each row that contains your IP address
7. In order to create a ticket, you will finally click the "Get Help/Support" option
8. You will be informed that your ticket has been opened as soon as it is created.

Best Practices to Keep You Out of Spam

Email Authentication

Email authentication can be difficult, but it's essential to confirm your identity and that the emails you're sending are valid.

Inbox providers trust authenticated mail a lot more, and as a result, those messages are more likely to arrive there. You can find more about this topic in this blog.

Update Your Lists

As subscribers unsubscribe from your list, email lists and subscribers automatically fluctuate.

Some people just aren't interested in receiving your emails, and that's fine!

More essential and significant than the number of contacts on your list is its quality.

The impact of low engagement on your sender reputation can be avoided with regular list updating. Some of the most efficient ways to clean your list include removing disinterested users, bounced emails, and other spam traps.

Do not take it personally: keep in mind that email list turnover is common. Improved delivery rates to the inbox are a result of being proactive and cleaning up your list.

Check Your Email Metrics

The tried-and-true way to track your email program's development and advancement is through metrics and email performance. Understanding your baseline data is crucial before you can use these key performance indicators:

  • Spam complaints
  • Open rates
  • Click-through rates
  • Delivery rates

When you begin monitoring these metrics, don't get alarmed if you see any troubling tendencies. The most crucial thing you can do to solve the issue is to move swiftly and calmly.

Make Use of a Spam Tester

With the use of online programs called spam checkers, you may test your emails and find out whether or not receivers are likely to designate them as spam.

Even though ISPs ultimately decide how messages are screened, spam checkers frequently give senders peace of mind as they plan new campaigns.

For example, GlockApps is a typical spam checker that shows you whether your email ends up in spam.

Use Warm for Inbox Warm Up

An easy way to send email campaigns without any spam or blacklisting issues is Warm.

An easy-to-use email warm up tool, it ensures your email will reach your recipient's inboxes.

We offer services such as automatic warm up campaigns, which send automatic emails from your inbox and automatically interact with them to increase your email deliverability.


Being blacklisted doesn’t mean you should panic.

Often there are basic conditions that are required but not given in order to void being blacklisted. The good news is that, in most cases, you can remove yourself from the Sorbs blacklist.

To keep a healthy email reputation, you can use warm to send your next email campaigns directly to your recipient's inboxes.

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